First of all, lead to the procedure of upper intake manifold withdrawal, release the fuel pressure and disconnect the negative terminal of the vehicle battery. Pump out the coolant and disconnect the coolant hoses from the throttle body and from the intake manifold, be sure to cap the hoses. Third, pull out the air intake duct and undo the APP sensor connector and hoses and other connecting wires around the throttle body. Next remove the intake manifold cover and then disconnect the vacuum hoses from the rear side of the intake manifold, and then apply tape on each of the hoses to help reassembly later. Disconnect the engine harness connectors from the corresponding parts, additionally, apply the labels on the connectors. In accordance with the reversals of the tightening sequence, undo the bolts and nuts, so as to pull off the manifold with the throttle body connected. Many apply the installation procedure by cleaning the mounting surfaces of the lower manifold, putting a new layer of gasket on it then placing the upper intake manifold, locking the nuts and bolts in the most appropriate sequence tightening them to the recommended torque. Connect the battery and top up the cooling system. For the low side intake manifold first you must uninstall the upper side intake without which you cannot uninstall the power steering pump without disconnecting its hoses. Remove the screws that hold the electrical connectors at the fuel injectors and label all the connectors, and take off the fuel rails from the lower intake manifold. The two lower intake manifold sections bolt to the cylinder heads, so remove them carefully so as not to scratch the two surfaces that come into contact with the gasket. Scrape off the remnants of the gasket and clean the joints on both the surfaces. New gaskets must be put in, the lower manifolds put on the cylinder heads and aligned over the dowels before nuts and bolts are tightened. Three cycles of equal quarter turns followed by a further tightening of the fasteners to the torque. Lastly fit the upper intake manifold, and finish up by topping the cooling system and starting the engine, to confirm any fuel, vacuum and coolant leaks.
